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Understanding Computers (Input-Output-Process (Output (Headphones, 3D…
Understanding Computers
Input-Output-Process
Input
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Scanner 
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ROM
Once data has been written onto a ROM chip, it cannot be removed and can only be read.
Unlike main memory (RAM), ROM retains its contents even when the computer is turned off.
RAM
Random Access Memory (RAM) is a hardware device that allows information to be stored and retrieved on a computer.
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RAM is a volatile memory and requires power to keep the data accessible. If the computer is turned off, all data contained in RAM is lost.
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ASCI Table
ASCII character encoding provides a standard way to represent characters using numeric codes. These include upper and lower-case English letters, numbers, and punctuation symbols. ASCII uses 7 bits to represent each character